How to fix sage 50 invoice errors – Email MAPI Error “Error 2 MAPI E FAILURE “. Confirm your email client is setup because the default email program in your computer. attend Control Panels, Default Programs, Set your default programs, select your email client and click on Choose defaults for this program, confirm the box of Send Mail is checked under MAPI. Click for more info- https://www.accountingadvice.co/fix-sage-50-invoice-errors/